1. Click on the Windows icon in the lower left-hand corner of your screen, and search for "Communications Utility". When "Communications Utility" OR "Lenovo - Web Conferencing" appear in the search results, click on it. (They are the same thing.)

2. Click on the "Show my video image" button to the right of the image of the camera with a line through it. This should unmute your camera, and you should be able to see yourself in the preview window.

3. Close the Communications Utility, and continue with your session.

Uninstall the camera driver

If the above didn't work, you can reset your built-in camera settings by uninstalling its driver. (You will need to end your session first.)

1. Click on the Windows icon in the lower left-hand corner of your screen, and search for "Device Manager" and then click on it in the search results.

2. Click on the arrow next to "Imaging Devices" to find the driver for your built-in camera. Then right-click on "Integrated Camera" and select "Uninstall".

3. Click "OK" on the message that appears to confirm uninstalling the driver.